Added contribution and issue templates.

.github/CONTRIBUTING.md

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+# How To Contribute
+
+Contributions are more than welcome! The more people who contribute to the project the better Empire will be for everyone. Below are a few guidelines for submitting contributions.
+
+
+## Creating Github Issues
+
+Please first review the existing Empire issues to see if the error was resolved with a fix in the development branch or if we chose not to fix the error for some reason.
+
+The more information you provide in a Github issue the easier it will be for us to track down and fix the problem:
+
+* Please provide the version of Empire you are using.
+* Please provide the OS and Python versions that you are using.
+* Please describe the expected behavior and the encountered error.
+  * The more detail the better!
+  * Include any actions taken just prior to the error.
+  * Please post a screenshot of the error, a link to a Pastebin dump of the error, or embedded text of the error.
+* Any additional information.
+
+
+## Submitting Modules
+
+* Submit pull requests to the [dev branch](https://github.com/powershellempire/Empire/tree/dev). After testing, changes will be merged to master.
+* Base modules on the template at [./modules/template.py](https://github.com/PowerShellEmpire/Empire/blob/dev/lib/modules/template.py). **Note** that for some modules you may need to massage the output to get it into a nicely displayable text format [with Out-String](https://github.com/PowerShellEmpire/Empire/blob/0cbdb165a29e4a65ad8dddf03f6f0e36c33a7350/lib/modules/situational_awareness/network/powerview/get_user.py#L111).
+* Cite previous work in the **'Comments'** module section.
+* If your script.ps1 logic is large, may be reused by multiple modules, or is updated often, consider implementing the logic in the appropriate **data/module_source/*** directory and [pulling the script contents into the module on tasking](https://github.com/PowerShellEmpire/Empire/blob/0cbdb165a29e4a65ad8dddf03f6f0e36c33a7350/lib/modules/situational_awareness/network/powerview/get_user.py#L85-L95).
+* Use [approved PowerShell verbs](https://technet.microsoft.com/en-us/library/ms714428(v=vs.85).aspx) for any functions.
+* PowerShell Version 2 compatibility is **STRONGLY** preferred. 
+* TEST YOUR MODULE! Be sure to run it from an Empire agent before submitting a pull to ensure everything is working correctly.
+* For additional guidelines for your PowerShell code itself, check out the [PowerSploit style guide](https://github.com/PowerShellMafia/PowerSploit/blob/master/README.md).

.github/ISSUE_TEMPLATE.md

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+## Empire Version
+
+
+## OS Information (Linux flavor, Python version)
+
+
+## Expected behavior and description of the error, including any actions taken immediately prior to the error. The more detail the better.
+
+
+## Screenshot of error, embedded text output, or Pastebin link to the error
+
+
+## Any additional information